a typical dry cell

The dry cell is a modification of the wet Leclanche cell in which the ammonium chloride solution is replaced with a jelly composed of starch, flour and ammonium chloride. The positive electrode, namely carbon rod is surrounded by a mixture of manganese dioxide and carb..

Electricity, Heating, Magnetic Effects..

Thermal-Chemical Effects of Currents..

Animal cell Plant cell Usually smaller in size Usually larger in size Cell wall is absent. Cellulose in any form is absent Cell wall made up of cellulose is present Cytoplasm is denser, more granular and occupies most of the space in ..

This is a portable form of Leclanche Cell. A moist paste of NH 4 Cl and ZnCl 2 is contained in a zinc vessel acting as the negative electrode. ZnCl 2 is added to the electrolyte NH 4 Cl. It keeps the paste moist because it is highly hygroscopic. The top is sealed with shellac or pitch so ..

Epiblema is the outermost covering of the root formed by a single layer of compactly arranged, barrel-shaped parenchyma cells. The cells are characteristically thin-walled since they are involved in absorption of water. A cuticle and stomata are absent. Some of the epiblem..

The multipolar neuron represents the most common type of neuron. It has a more or less star shaped cell body or cyton that is bound by a plasma membrane. It encloses a granular cytoplasm, commonly called as neuroplasm. It is characterized by the presence of a prominent nucleus and a numbe..

In these the redox reactions occur only once and cannot be used again. Example: dry cells, mercury cells..